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GPT 5.5 vs GPT 4o Mini
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.5
FlagshipGPT 4o Mini
Fast / BudgetInput $/MTok
$5.00
$0.15
Output $/MTok
$30.00
$0.60
Cache discount
90% off
50% off
Context
1,050K
128K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
91
vs
0
Code Review
90
vs
0
Summarization
89
vs
0
Q&A
90
vs
0
Extraction
87
vs
0
Reasoning
95
vs
0
Classification
85
vs
0
Creative Writing
91
vs
0
GPT 5.5
GPT 4o Mini
Guidance
When to use GPT 5.5 vs GPT 4o Mini
Choose GPT 5.5 when...
- -You need a larger context window (1,050K vs 128K)
- Similar performance; consider provider preference or ecosystem fit.
Choose GPT 4o Mini when...
- -Cost matters: 97% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.5
GPT 4o Mini
100K tokens
$1.25
$0.03Cheaper
1M tokens
$20.50
$0.28Cheaper
10M tokens
$205.00
$2.85Cheaper
FAQ
When should I use GPT 5.5 instead of GPT 4o Mini?
GPT 5.5 and GPT 4o Mini perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 4o Mini cheaper than GPT 5.5?
Yes. GPT 4o Mini input costs $0.15/MTok vs $5.00/MTok for GPT 5.5, saving 97% on input.
What are the context window sizes for GPT 5.5 and GPT 4o Mini?
GPT 5.5 has a 1,050K token context window. GPT 4o Mini has a 128K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How GPT 5.5 and GPT 4o Mini stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.